To give you a comparison on my car(same mods):
Mustang dyno- 355 rwhp and 437 rwtorque
Dynojet- 404 rwhp and 502 rwtorque
My mustang dyno sheet says to compare these hp/tq results to factory net ratings, multiply by 1.31 for a rough approximation which when you multiply my mustang #'s, it comes out pretty close.